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The ALICE EMCal L1 trigger first year of operation experience

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Published 9 January 2013 Published under licence by IOP Publishing Ltd
, , Citation O Bourrion et al 2013 JINST 8 C01013 DOI 10.1088/1748-0221/8/01/C01013

1748-0221/8/01/C01013

Abstract

The ALICE experiment at the LHC is equipped with an electromagnetic calorimeter (EMCal) designed to enhance its capabilities for jet, photon and electron measurement. In addition, the EMCal enables triggering on jets and photons with a centrality dependent energy threshold. After its commissioning in 2010, the EMCal Level 1 (L1) trigger was officially approved for physics data taking in 2011. After describing the L1 hardware and trigger algorithms, the commissioning and the first year of running experience, both in proton and heavy ion beams, are reviewed. Additionally, the upgrades to the original L1 trigger design are detailed.

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